Centrifugal tube-casting apparatus



y 1931. 1. BlGNAMl ET AL 1,315,093

CENTRIFUGAL TUBE CASTING APPARATUS Filed May 20, 1929 I err/tons,

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Eng/ ho Make and; Gama 112M,

"e 2? MW 45 Upon Patented July 21, 1931 UNITED STATES rsrnono Brennan,nnconn GALASSINI, mimic rnAncnI,

socm'ra BRESGIA, ITALY, ASSIGNOBS I FEBBIEBE rRANcHI-enmomm, or ransom,ITALY I cnn'rnrruesr. runn-cas'rme Arrnwrus Application filed m 20,1929. Serial No. 364,616.

Z tubes in which the metal in molten state 1s fed to and poured by meansof a pouring channel into a rotating mould are already known, thepouring 5 channel and the mould 'having a relative movement.

Nevertheless, when tubes of small diameter are to be cast, thisarrangement is open to considerable objections because the pouringchannel tends to oscillate by reason of the shocks to which it isinevitably. subjected, and consequently it ma'y strike against the sidesof the rotatin mould and thereby interfere with the regifiarity ofthe'casting's'. The present invention has for its 0 machine wherein thepouring channel is fixed while the mould is'mounted to rotate upon acarriage which is movable longitudinally, thetwo movements, that is,translation of the carriage and rotation of the mould, being controlledthrough suitable transmissions by two, electric motors, hich controlsMachines for casting b ect a the one w the-rotationbeing mounted upon acarriage and movable therewith. g The other motor controls the straightmotion of the truck carrying the moul an also controls the tilting ofthe reservoir com taining the molten metal, by

advantage is obtained over ther similararrangements having these twomotions controlled by distinct motors thata uniform thickness of thecast tubes is secured. The single figure 0f the accompanying drawingshows by way of example and in cipal features of the improved machine.

In the arrangement illustrated, 1 indicates a carriage mounte on wheels8 running on guides 9 and provided with rollers 2 mounted upon alongitudinal shaft 2' driven by means, of a suitable transmission 7 froman electric motor 5 mounted upon a su'table base 6 fixed to a metalcasing 10hereinafter mentioned.

the rollers 2 rest the collars 3' of the tubular rotating mould 3'intowhich the fixed. pouring channel 3' pours the molten metal which comesfrom a feed reservoir B of any suitable type.

The rotation of rollers 2 causes the rotation ment isefiected by a motortrols the reservoir B.

enclosed in the cylindrical d therewith;

which means the latter; and aseparate driving diagrammatic longitudinalsection the princomprising a of the mould 3. The motor 5 may, with theaid of a suitable transmission,.control a carriage-feeding mechanismwhich imparts to the carriage an axial translation movement at asuitable speed; this movement may also begiven to the carriage byanother independent motor by means of kind. In the construction shown,this move- 11 which also con- T he mould is casing 10 which is ma ofsheet iron and is adapted to prevent the dispersion of the cool-v meansof peri the ing water which is sprayed by outer surface 0 forated tubesupon the rotating mould.

' The accessory arrangements may of course controls of any .otheri bevaried without departing from the spirit of the invention.

What we claimis: 1. A centrifugal comprising a hollow,longitudinally-moving carriage casing is mounted; a tubular mouldmounted within said casing to move longitudinally means for rotatingsaid'mould to the casing; ing channel extending within said moul atiltable' feeding reservoir metal and discharge it into said" channel;an electric motor; a driving connection between said "motor andreservoir for tilting the cylindrical casing; a

relatively tween the motor and carriage to efiect the ad: vance of saidcarriage.

2. A centrifugal tube-casing apparatus, hollow, cylindrical casing; alongitudinally-movable carriage whereon t e casing is mounted; a tubularmould mounted within said casing to .move longitudinally therewith; amotor mounted on the upper portion of said casing; a connection betweensaid motor-and said mould to rotate the mould relatively to the casing;a ing channel extending within the mould; a tiltable feeding reservoirto receive molten metal and discharge it into said channel; a motorexternal to said casing; a driving connection between the last-namedmotor and the reservoir for tilting the latter and a sepaa stat onarypourconnection betubecasting apparatus,

whereon the a to receive molten advance of said carri rate drivingconnection between said lastnamed motor and the carriage tov eifect thegen 3. I In a centrifugal tube-casti av longltudinqlly-movable carnage;a tubuand carriage to effect the advance of said carriagef tures.

ISIDORO BIGNAMI.

.RCOLE GALASSINI. EMILIO FRANCHI. GIULIO PONS.

In testimony whereof we alfix our signa-

